An expandable implant includes a first plate and a second plate spaced from each other along a first direction. The first plate defines a first bone-contacting surface configured to contact a superior vertebral body and the second plate defines a second bone-contacting surface opposed to the first bone contacting surface along the first direction. The second bone contacting surface is configured to contact an inferior vertebral body. The implant includes an actuation member at least partially disposed between the first and second plates with respect to the first direction. The actuation member defines a first axis, a first end and a second end spaced from the first end along a second direction along the first axis. The second direction is perpendicular to the first direction. The implant includes first and second wedge members carried by the actuation member and in engagement with the first and second plates, and also includes a drive member defining a second axis, a proximal end and a distal end spaced from the proximal end along a third direction along the second axis. The third direction is perpendicular to the first direction and offset from the second direction. The drive member is configured to communicate a driving force to the actuation member so as to cause the actuation member to rotate about the first axis, and at least one of the first and second wedge members is configured to translate along the second direction in response to rotation of the actuation member about the first axis so as to move at least one of the first and second plates with respect to the other of the first and second plates along the first direction.

A surgical driver apparatus includes a housing and an inner driver shaft having a proximal end secured within the housing and a distal end extending out from a first side of the housing. The inner driver shaft is configured to rotate with respect to the housing. The surgical driver apparatus further includes an outer driver shaft and an idler driver shaft. The outer driver shaft is positioned coaxial with the inner driver shaft and configured to rotate independently from the inner driver shaft. The idler driver shaft is configured to transmit torque to the outer driver shaft. Additionally, the surgical driver apparatus includes a driver key comprising a driving feature and a counter-driving feature. The driver key is configured to engage a second side of the housing in one of a plurality of orientations configured to rotate the inner driver shaft and/or the outer driver shaft.

An expandable intervertebral implant comprises an expandable cage comprising a central frame, a superior endplate, an inferior endplate, an anterior adjustment mechanism and a posterior adjustment mechanism. The central frame including an anterior (distal) threaded bore and a posterior (proximal) bore. The superior (upper) end plate movably coupled along a posterior portion of the central frame. The inferior (lower) end plate movably coupled along the posterior portion of the central frame opposite the superior end plate. The anterior adjustment mechanism including an anterior wedge coupled to an anterior screw movable within the anterior threaded bore. The posterior adjustment mechanism including a posterior wedge coupled to a posterior screw movable within the posterior bore.

A geared cam expandable spinal implant. Rotational motion of a rotating portion is translated into linear motion of a yoke, which moves geared cams at the distal end of the implant to mate with, and walk along, teeth of corresponding racks. The walking of the gear cam teeth along the rack teeth creates a regular rate of implant expansion, reduces initial excessive expansion force applied to the implant, and provides fine adjustment of the expansion rate and force.

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In an exemplary embodiment, the present invention provides an intervertebral implant. The intervertebral implant may be configured to transition from a collapsed configuration having a first height and a first width to an expanded configuration having a second height and a second width.

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. The fusion device described herein is capable of being installed inside an intervertebral disc space at a minimum to no distraction height and for a fusion device capable of maintaining a normal distance between adjacent vertebral bodies when implanted.

An expandable fusion device is capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. The fusion device may include a body portion, a first endplate, and a second endplate, the first and second endplates capable of being moved in a direction away from the body portion into an expanded configuration or capable of being moved towards the body portion into an unexpanded configuration. The fusion device is capable of being deployed and installed in both configurations.

Provided is an expandable lumbar cage including an upper member, a lower member, a sagittal adjustment unit to adjust sagittal balance of a spine, and a coronal adjustment unit to adjust coronal balance of the spine. According to the foregoing description, it is possible to simultaneously adjust the sagittal balance of the spine as well as the coronal balance, thereby achieving effective treatment of the spine having compound deformity.

A dilation introducer for orthopedic surgery is provided for minimally invasive access for insertion of an intervertebral implant. The dilation introducer may be used to provide an access position through Kambin's triangle from a posterolateral approach. A first dilator tube with a first longitudinal axis is provided. An access cannula may be introduced over the first dilator tube. A drill may be inserted through the access cannula and used to perform a foraminoplasty, Surgical instruments may pass through the access cannula to operate on an intervertebral disc and/or insert an intervertebral implant.

A device includes a core having proximal and distal ends and defining a first female thread. A drive screw includes first and second ends. The first end includes a first male thread. The second end including a second male thread that engages the first female thread. A first body includes a second female thread that engages the first male thread. A second body is coupled to the drive screw. A first plate is coupled to the core and the first body. The first plate includes a first vertebral engaging surface. A second plate is coupled to the core and includes a second vertebral engaging surface. The drive screw is configured to rotate relative to the core to simultaneously pivot the first plate relative to the core and alter a distance between the first vertebral engaging surface and the second vertebral engaging surface.